At The Atlantic, Ron Brownstein write
Except for 1988, when George H.W. Bush prevailed after two terms of Ronald Reagan, neither side has held the White House for more than eight consecutive years since 1952. (That’s despite the fact that Democrats since 1992 have now twice won the popular vote in three consecutive elections.)
And while Republicans are understandably euphoric that they will control the White House and both congressional chambers next year, neither party since 1968 has maintained such unified control for more than four consecutive years, a far more rapid turnover than in earlier generations. History suggests the best advice for Republicans now celebrating their unified control might be three simple words: Don’t unpack everything.